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Canon EOS 90D vs Canon EOS D30: read noise comparison

Input-referred read noise at base ISO: Canon EOS 90D 6.5 e⁻ (ISO 100), Canon EOS D30 19 e⁻ (ISO 100).

Canon EOS 90D

The Canon EOS 90D was measured at 25 ISO settings from ISO 100 to ISO 25600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 3.92 DN, or 6.5 electrons at the sensor. From ISO 5000 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Full well at base ISO is about 26,435 electrons; unity gain is around ISO 170.

Canon EOS D30

The Canon EOS D30 was measured at 5 ISO settings from ISO 100 to ISO 1600. Values are Bill Claff's (Photons to Photos) direct measurements from raw files.

At base ISO (100) read noise is 1.65 DN, or 19 electrons at the sensor. From ISO 200 up the camera is effectively ISO-invariant: raising ISO further doesn't meaningfully lower shadow noise. Settings above ISO 800 don't change analog gain (digital push). Full well at base ISO is about 46,046 electrons; unity gain is around ISO 1160.

Canon EOS 90D vs Canon EOS D30 read noise table

ISOCanon EOS 90DCanon EOS D30
1003.9181.647
1255.098–
1603.732–
2004.6912.621
2505.979–
3204.627–
4005.8564.959
5007.464–
6406.681–
8008.3409.646
100010.629–
125011.081–
160014.0269.580
200017.630–
250019.427–
320024.084–
400030.696–
500033.591–
640041.933–
800053.076–
1000064.893–
1280081.572–
16000101.829–
20000128.000–
25600159.786–

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Data: Photons to Photos · © William J. Claff